<template>
  <div class="xtx-goods-page" v-if="goods">
    <div class="container">
      <!-- 面包屑 -->
      <XtxBread>
        <XtxBreadItem to="/">首页</XtxBreadItem>
        <XtxBreadItem :to="`/category/${goods.categories[1].id}`">{{
          goods.categories[1].name
        }}</XtxBreadItem>
        <XtxBreadItem :to="`/category/sub/${goods.categories[0].id}`">{{
          goods.categories[0].name
        }}</XtxBreadItem>
        <XtxBreadItem>{{ goods.name }}</XtxBreadItem>
      </XtxBread>
      <!-- 商品信息 -->
      <div class="goods-info">
        <div class="media">
          <GoodsImage :images="goods.mainPictures" />
          <GoodsSales />
        </div>
        <div class="spec">
          <GoodName :goods="goods" />
          <GoodsSku :goods="goods" @change="changeSku" />
          <XtxNumbox label="数量" v-model="num" :max="goods.inventory" />
          <XtxButton @click="insertCart" type="primary" style="margin-top: 20px"
            >加入购物车</XtxButton
          >
        </div>
      </div>
      <!-- 商品推荐 -->
      <GoodsRelevant :goodsId="goods.id" />

      <!-- 商品详情 -->
      <div class="goods-footer">
        <div class="goods-article">
          <GoodsTabs />
          <!-- 商品+评价 -->
          <div class="goods-tabs"></div>
          <!-- 注意事项 -->
          <div class="goods-warn">
            <GoodsWarn />
          </div>
        </div>
        <!-- 24热榜+专题推荐 -->
        <div class="goods-aside">
          <GoodsHot :type="1" />
          <GoodsHot :type="2" />
        </div>
      </div>
    </div>
  </div>
</template>

<script>
import Message from '@/components/library/Message'
import GoodsRelevant from './components/goods-relevant'
import GoodsImage from './components/goods-image'
import GoodsSales from './components/goods-sales.vue'
import GoodName from './components/goods-name.vue'
import GoodsSku from './components/goods-sku.vue'
import GoodsTabs from './components/goods-tabs.vue'
import GoodsHot from './components/goods-hot.vue'
import GoodsWarn from './components/goods-warn'
import { findGoods } from '@/api/goods'
import { useRoute } from 'vue-router'
import { nextTick, provide, ref, watch } from 'vue-demi'
import store from '@/store'
export default {
  name: 'XtxGoodsPage',
  components: {
    GoodsRelevant,
    GoodsImage,
    GoodsSales,
    GoodName,
    GoodsSku,
    GoodsTabs,
    GoodsHot,
    GoodsWarn,
  },

  setup() {
    const goods = useGoods()
    provide('goods', goods)
    // sku改变时候触发
    const changeSku = (sku) => {
      if (sku.skuId) {
        goods.value.price = sku.price
        goods.value.oldPrice = sku.oldPrice
        goods.value.inventory = sku.inventory
        currSku.value = sku
      } else {
        currSku.value = null
      }
    }
    // 选择的数量
    const num = ref(1)

    // 加入购物车逻辑
    const currSku = ref(null)

    const insertCart = () => {
      if (!currSku.value) {
        Message({ type: 'error', text: '请选择商品规格' })
        return
      }
      if (num.value > goods.inventory) {
        Message({ type: 'error', text: '库存不足' })
        return
      }
      store
        .dispatch('cart/insertCart', {
          id: goods.value.id,
          skuId: currSku.value.skuId,
          name: goods.value.name,
          picture: goods.value.mainPictures[0],
          price: currSku.value.price,
          nowPrice: currSku.value.price,
          count: num.value,
          attrsText: currSku.value.specsText,
          selected: true,
          isEffective: true,
          stock: currSku.value.inventory,
        })
        .then(() => {
          Message({ type: 'success', text: '加入成功' })
        })
    }
    return { goods, changeSku, num, insertCart }
  },
}

// 获取商品详情
const useGoods = () => {
  const goods = ref(null)
  const route = useRoute()
  // 出现路由地址商品ID发生变化，但是不会重新初始化组件
  watch(
    () => route.params.id,
    (newVal) => {
      if (newVal && `/product/${newVal}` === route.path) {
        findGoods(route.params.id).then((data) => {
          // 让商品数据为null让后使用v-if的组件可以重新销毁和创建
          goods.value = null
          nextTick(() => {
            goods.value = data.result
          })
        })
      }
    },
    { immediate: true }
  )

  return goods
}
</script>

<style scoped lang='less'>
.goods-info {
  min-height: 600px;
  background: #fff;
  display: flex;
  .media {
    width: 580px;
    height: 600px;
    padding: 30px 50px;
  }
  .spec {
    flex: 1;
    padding: 30px 30px 30px 0;
  }
}

.goods-footer {
  display: flex;
  margin-top: 20px;
  .goods-article {
    width: 940px;
    margin-right: 20px;
  }
  .goods-aside {
    width: 280px;
    min-height: 1000px;
  }
}
.goods-tabs {
  min-height: 600px;
  background: #fff;
}
.goods-warn {
  min-height: 600px;
  background: #fff;
  margin-top: 20px;
}
</style>
